Nut-lock.



` F. H. MASOW.

. NUT LOCK.

AAAAAAAAAAAAAAAAA UG. l0, 1912.

f ....lulilalla c Illllllllllwllim m Patented Feb. 11, 1913.

FRANK'H. MASOW, OF SAN FRANCISCO, CALIFORNIA.

NUT-LOCK.

waarna.

Specication of Letters P atent.

Patented Feb. 11, 1913.

Application filed August 10,` 1912. Serial No. 714;374.

T 0 all whom #may concern Be it known that I, FRANK H. MAsow, a citizen of the United States, residing in the city and county of San Francisco and State of California, have invented new and useful Improvements in Nut-Locks, of which the following isa specification.

This invention relates to a nut lock.

It is the object of this invention toprovide a device for locking nuts on bolts to prevent theirbeing loosened.

A further object is to provide a nut lock which is particularly adapted for use in railroad construction, and which is especially designed to prevent the nuts from being loosened on the bolts by the vibration of the tracks, as occasioned by the passage of trains thereover, or from other` accidental causes.

Another object is to provide a nut lock which can be readily disengaged to permit the nut being removed when desired.

The invention primarily resides in a washer having means for engaging it with the surface surrounding the bolt on which it is placed to prevent its turning thereon, and a plate-ring surrounding the bolt having means for connecting it to the washer and for engaging it with a nut screwed on the bolt to prevent turning of the latter in one direction.

The invention further consists of the parts and the construction and combination of parts' as hereinafter more fullyk described and claimed, having reference to the accompanying drawings, in whichn i Figure 1 is a vertical section of a railroad rail, showing the invention asapplied in side elevation. Fig. 2` is a detail plan view of the plate-ring blank. Fig. 3 is a detail plan view of the nutwasher. Fig. 4- is a detail in perspective of the nut and nut lock. Fi 5 is a view 'showing a modified form of t e invention.

In the drawings A represents a bolt and 2 indicates a nut which is adapted to be screwed on the bolt A in the usual manner. The bolt A and the nut 2here shown, are those commonly em loyed in railroad con'- struction in bolting dish-plates 3 to the abutting ends of the railroad railsli.

n carrying outl this invention, the fish-4 plates 3 are formed with longitudinally extending grooves 5 which extend from the usual pertorations formed in the sh-plates be presently described.

for the reception of the bolts A; the grooves 5 belng provided as a means for engaging a projection 6. on the underside of a washer 7 which is designed tobev placed on the bolt A between thev nut 24 and the iish-plate 3. The groove 5 is formed with one vertical when the washer 'is on the bolt vand engaged with the fish-plate, and the nut 2 is screwed on the bolt, the projection will abut against the vertical wall of the groove and prevent the washerl 7 being rotated in the direction traversed by the nut when it isl turned to unscrew itv from the bolt, a's will -The nut-engaging means consists `of a plate-ring 8 which is formed with slots 9 and 9', as shown in Fig. 2; the material forming one wall of the slot 9 being bent.

downward to formx a tongue 10 which is adapted to extend into a notch l1 formed in the outer face of the washer 7, when the plate-ring 8 is .placed thereagainst, as shown in Figs. l and 4.

In Vthe application of this invention the bolt A is passed through the fish plates 3 and rail 4 in the usual manner. The washer 7 is then placed onthe bolt A, with the'projection 6 thereon extending into the groove 5 on the-iish-plate 3 adjacent thereto. The plate-ring 8 is then positioned on the bolt A adjacent to the washer 7 and with the Atongue 10 extending into the notch 11. The -nut then being screwed on the bolt A and drawn tight against the plate-ring 8, the

tongue 12, formed by the material of the plate-ring adjacent to the slot-9', is turned outwardly alongside of one of the fiat sides of the bolt, as shownin Fig. l; the fiat side of the tongue 12 extending parallel with the flat side of the nut, thereby efectively locking the latter against bein unscrewed. When it is desired to remove t e nut 2, the tongue 12 is depressed so as to allow the nut to be turned thereover.

It will be observed that when the nut 2 is tightened on the bolt A, the washer 7 and the plate-ring 8 will be prevented from.

turning with the nut by :reasonv of the projection 6 on the washer '7 engaging the fishplate 3, and the tongue 10 on the plate-ring 8 engaging the notch 11 on thef washer 7, and that any tendency of the nut to come unscrewed will be prevented by reason of the projection 6 engaging the vertical Wall of the groove 5, and the tongue 10 engaging the vertical wall of the notch 11, thusmaki ing the washer and plate rigid so .that the tongue '12 will be eiective in preventin the nut being turned in the unscrewing irection.

" The use offthe washer 7 is particularly advantageous when it bears againstl a compressible material, such as al timber, in'

which event the projection 6 acts asl av spur and is forced into the timber, as shown in .dotted lines in Fig..4. In some lnstances the washer 7 may beentirely rdispensed with; the plate-ring 8 being alone employed, and then serving asa 4combined washer and nut lock, in which case the tongue will be f engagefwith any surface against which the undersi e of the*plate may Contact.

Having thus described my invention, what Y I claimand desireto secure by Letters Patjoints having a bolt hole intermediate of its upper and lower edges, and a. longitudinal,

shouldered groove on the crown of the arch, a. rigid washer perforated to fit the bolt and having a solid integral spur to engage the groove 1n the flshplate, and` a corresponding radial, shouldered notch in its o posite surface, a second washer slotted to orma 'i FRANK H. MAsow.

. Witnesses C. O. BEAN, J. M. MORRISON.- 

